1. A person afflicted with psychosis
   "The patient was diagnosed as a psycho requiring immediate treatment";
   - psychotic, psychotic person
    
2. Someone with a sociopathic personality; a person with an antisocial personality disorder
   "The detective suspected the criminal was a psycho";
   - sociopath, psychopath

1. Relating to or characterized by psychopathy, especially showing antisocial behaviour and lack of empathy
   "The author deals with a most difficult problem which is the psychiatric treatment of the psycho offender";
   - psychopathic, psychopathologic, psychopathological

Derived forms: psychos

See also: insane

Type of: diseased person, mental case [informal], neurotic, psychoneurotic, sick person, sufferer

Encyclopedia: Psycho